than 35 times a year. The annualmean air quality objective 3 level for PM10 is 40µg ... Number of Exceedences Hourly mean 56 hours*** 10 days*** Running 8-hr mean 24 hour mean 4**** AnnualMean * Air Quality Regulations ... for sulphur dioxide is 266 ug/m when expressed as a 15 minute mean not to be exceeded more

for England Wales and NorthernIreland 3 *** The air quality objective level for ozone ... and NorthernIreland. Airwatch 2012 ... for PM10 is 50g/m not to be exceeded more than 35 times 3 a year. The annualmean air quality objective level for PM10 is 40g/m . Concentrations are reported as TEOM data